Aluminum grade 2xxx
grade 2xxx grades of this type of aluminum (2011, 2014, 2017, 2018, 2124, 2219, 2319, 201.0; 203.0; 206.0; 224.0; 242.0; Others require hot baking process to get the highest specification. In this process, Mechanical properties are similar. Or perhaps higher than that of low carbon steel. And in some cases, repeated heat treatment. It can increase mechanical properties. This heat treatment will increase the rooting point. This will damage the elongation. This will make the tensile strength is not good.
Aluminum alloy type 2xxx is not a good corrosion resistance like other aluminum alloys. And under certain corrosion conditions, corrosion can occur along the grain edge. Aluminum grades of 2xxx are useful for high strength applications at temperatures up to 150 ° C (300 ° F) but except for grades 2219. This grade of aluminum alloy has limited weldability. But some types of alloys in this category have excellent processing. The 2021 grade aluminum is the most popular grade in aircraft production.